Grizzly G0470 instruction manual Changing Oil, Check Valve

Symptom	Possible Cause		Possible Solution
Air leaks from pressure	1.	Faulty check valve.	1.	Repair the check valve
switch.				(see Page 19).
	2.	Faulty pressure switch.	2.	Replace pressure switch.
Air is dirty or has exces-	1. Tank is not drained.		1. Open drain valve and
sive moisture.				make certain all the water
				is drained out.
	2.	Delivery pipes are dirty.	2.	Remove delivery pipes,
				clean out and replace.

Changing Oil

Change the oil in the air compressor pump after the initial 50 hours, or 30 days of use; and every 300 hours, or 3 months after the first oil change. Use compressor oil or ISO 100/SAE 30W, non-detergent type oil.

To change the oil:

1.Unplug the air compressor and drain all the air from the tank.

2.Place a container to catch the oil under the oil sight glass.

3.Use a box end wrench or a socket wrench to remove the oil sight glass shown in Figure 12.

Oil Fill

Plug

Oil Sight

Glass

Figure 12. Oil sight glass.

4.Tip the compressor to drain all of the oil from the crank case.

5.Replace the oil sight glass and remove the fill plug shown in Figure 12.

6.Fill the crank case with oil until the oil level is in the center of the sight glass, then replace the oil fill plug.

Check Valve

The diaphragm and O-ring in the check valve can become damaged, twisted, or dirty and cause the check valve or pres- sure switch to leak air.

To fix the check valve:

1.Unplug the air compressor and drain all the air from the tank.

2.Remove the cap from the check valve (see Figure 13).

Cap

Figure 13. Check valve.

Model G0464/G0465/G0467/G0468/G0470 (Mfg. since 9/04) -19-